It is served by 'slow' (all stations) trains only (fast and semi-fast trains do not stop at stations between Wembley Park and Harrow-on-the-Hill). It takes an average time of 20 minutes from Baker Street.

Note that during evening peaks, services to Amersham or Chesham from Northwick Park or Preston Road require a change at Harrow-On-The-Hill.

During the morning peak (06:30 to 09:30), Fast services from Amersham and Chesham run non-stop southbound only between Moor Park, Harrow-On-The-Hill and Finchley Road whilst Semi-fast services from Watford and Uxbridge run non-stop southbound only between Harrow-On-The-Hill and Finchley Road. During the evening peak (16:30-19:30), Fast and Semi-fast services, which operate northbound only call additionally at Wembley Park.[3]